
CONTENTS. 
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Professor THoMAsS ANDREWS On the Microscopic Structure of certain Basaltic 
and Metamorphic Rocks, and the Occurrence of Metallic Iron in them ...... 
Professor JAMES APJOHN on the Results of Analysis of a Substance resembling 
the Pigolite of Professor JobmstOn ........sessseccssscesscessensserseneggeesees Arrigo 

Is the Mechanical Power capable of being obtained 
by a given amount of Caloric employed in the production of Vapour indepen- 
dent of the Nature of the Liquids? .........:.csccsccseseesceseaceeeeeeeeesssescnceees 
Mr. SAMUEL Bateson on Glynn and Appel’s Patent Paper for the prevention 
of Piracy and Forgery by the Anastatic Process .....sssssesssseseseeneees diagerens 
Mr. James S. BRAzreR on Irish-bog Butter.......csccseseceesecsecesenccsessseceeecs 
Professor T. GRAHAM on the Principle of the Endosmose of Liquids............ 
Professor Joun F. HopGeEs on the Phosphatic Nodules of the Greensand of 
the North of Ireland ....... igen dhatgtvate dss aleswedcaicebtal casey dad lwawate ce vevteneetess 
Mr. — Knox on the Effect of the Moon’s Rays ........csccseecsscescscesceececeees 
Mr. A. MacponnELL on the Atomic Weight of Magnesium .................0008 
Professor FREDERICK PENNY on the Estimation of Iodine ......... wei iraatETieis 
Professor E. RonAuDS on the Oil of the Sun-Fish ..........ssseesesseccseseeeecees 
Professor G. G. Strokes on the application of certain Optical Phenomena to 
Chemistry .......sseeceeeees Beotcnaaet scar emery manos SP OCE SR ROE eSAUeL ER SECOCE SE ELOEE 
Professor TENNANT on the Koh-i-Noor Diamond.............sceeeeeees Peo as 

Mr. Taomas Woops on Chemical Combination, and on the Amount of Heat 
produced by the Combination of several Metals with Oxygen ..............00 2 
————— on the Combination of Metals with Oxygen ............... 
GEOLOGY AND PHYSICAL GEOGRAPHY. 
Professor T. ANDREWS on a New Variety of Magnetic Iron Ore; with Re- 
marks upon the Application of Bicarbonate of Baryta to Quantitative Ana- 
LyS€S...eseeescesovesceees saseascunemcsanaceaarecuar c aeeaasaee Gencckednasssee etreree peaenee te 
Mr. W. BoLuaeRrtT on the Sources of Common Salt............esceseees s paweeie yc 
Sir Davip BrewsTER’s observations on the Diamond..........sssesceeseeeeeseeene 
Mr. James Bryce, jun., on the Geological Structure of the Counties of Down 
PEEVE ATAETUTID: oven s\cnnie eee ompaclgpasine scien aiene “Eedaaeae Seecaaeiwesdacaee’ eeeatuced eee scooters 
—-—_—__-—-——. on the Disposition of Granite Blocks in Argyllshire ... 
Major Cuarters on the Alps in the Vicinity of Mont Blanc .,.............ce0e0 
M. Acuitite Deesse’s Account of the Changes occasioned during the Cool- 
ing of the Granite of Mont Blanc........:0.-.s.scserereeens paait a terken na sper Saana® 
Dr, ANDREW FLEMING on the Rocks of the Upper Punjaub .......... aageeageaie 
person KE. Forsszs on the Fossils of the Yellow Sandstone of the South of 
reland...... Ceereeee vere eevecnesece Pavecessvece Meme eee eeaeeese ence ns sseees bee Cesenreseesens 
Mr. Joun GRAINGER on the Shells found in the Alluvial Deposits of Belfast... 
Mr. RicHarp Grirritu on the Lower Members of the Carboniferous Series 
of Ireland............ eas tale Ae ERE Be ite el Pane asics pute ks aban s Eee T a iaoae 
—————— Notices of the Geology of Ireland ............0csecceeseee 
Mr. Rospert Harkness on the Fossil Remains of the Lower Silurians of the 
South of Scotland, and their Position ............. POE SCE AGAR APCs Cee heck ies 
————— on the occurrence of Graphite at Almorness Head, 
- Kirkeudbrightshire............ “BOS EL ETOAP EE a aptesmadepnnaepeldes aadeees et ey aReaa th ate 
Mr. H, Hennessy’s Account of the Researches of German Geologists ......++» 



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